000 00315nam a2200121Ia 4500
008 221001s1969 xx 000 0 eng d
082 _a551.1 SPE
100 _aSpencer, Edgar W.
245 0 _aIntroduction to the structure of the earth
260 _aNew York
_bMcGraw-Hill
_c1969
300 _a597p.
942 _2ddc
_cBK
999 _c4278
_d4278